2 Answers

They don't. You might be confusing the HUD with the two small colour
LCDs that surround the speedometer (if the MyFordTouch option is
equipped - it's an option on the SE trim and standard on the Titanium
trim). The screen to the right of the speedo can be configured to show
navigation info (speed limit and next turn) which is what HUDs in other
cars are commonly used for. I find this feature to be a really effective
"poor man's HUD" :)

Actually, the Fusion Hybrid has had an HUD since 2013, but it's
ONLY for the Collision-Warning system. When it activates,
besides a loud audible alarm, the in-dash projector flashes a
bright red bar on the windshield while the alarm sounds. That's
ALL it does, and it does that only if one purchases the package
that includes collision warning. But that's why dc3355 has been
hearing about the Fusions "HUD." It's an HUD only in the
technical sense.